<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>CSS 3D Srarch Box UI Design</title>
  <style>
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: consolas;
    }

    body {
      display: flex;
      justify-content: center;
      align-items: center;
      min-height: 100vh;
      background: #cfd1e1;
      /* overflow: hidden; */
    }

    .searchBox {
      position: relative;
      width: 65px;
      height: 50px;
      display: flex;
      justify-content: center;
      align-items: center;
      transition: 0.5s;
    }

    .searchBox:hover {
      width: 400px;

    }

    .searchBox::before {
      content: '';
      top: 0;
      left: 0;
      width: 10px;
      height: 100%;
      background: linear-gradient(#fff, #fff, #e3e3e3);
      z-index: 1;
      filter: blur(1px);
    }

    .searchBox::after {
      content: '';
      position: absolute;
      top: 0;
      right: -1px;
      width: 10px;
      height: 100%;
      background: #9d9d9d;
      z-index: 1;
      filter: blur(1px);
    }

    .shadow {
      position: absolute;
      top: 0;
      /* calc() 函数用于动态计算长度值。 */
      left: -50px;
      width: calc(100% + 50px);
      height: 300px;
      background: linear-gradient(180deg, rgba(0, 0, 0, 0.1), transparent, transparent);
      /* transform-origin 属性允许您改变被转换元素的基点。
          默认情况是以自身为中心，通过该属性可以修改当元素发生变化
          的时候按照哪里为中心变化
      */
      transform-origin: top;
      transform: skew(45deg);
      /*倾斜45度*/
    }

    .shadow::before {
      content: '';
      position: absolute;
      width: 50px;
      height: 50px;
      background: #cfd1e1;
      z-index: 1;

    }

    .searchBox input {
      position: 100%;
      width: 100%;
      height: 100%;
      border: none;
      padding: 10px 25px;
      font-size: 1.1em;
      color: #555;
      /* 线性梯度：表示渐变色 */
      background: linear-gradient(#dbdae1, #a3aaba);
      /* 阴影
{box-shadow:X轴偏移量 Y轴偏移量 阴影模糊半径 阴影扩展半径 阴影颜色 投影方式 }*/
      box-shadow: 5px 5px 5px rgba(0, 0, 0, 0.1),
      15px 15px 15px rgba(0, 0, 0, 0.1),
      20px 20px 15px rgba(0, 0, 0, 0.1),
      30px 30px 15px rgba(0, 0, 0, 0.1),
        /*阴影向内*/
      inset 1px 1px 2px #fff;
    }

    .searchBox input::placeholder,
    .searchBox input {
      color: transparent;
    }

    .searchBox:hover input::placeholder,
    .searchBox:hover input {
      color: #555;
    }

    .icon {
      position: absolute;
      right: 20px;
      columns: #fff;
      width: 25px;
      cursor: pointer;
    }
  </style>
</head>

<body>
<div class="searchBox">
  <!-- <div class="shadow"></div> -->
  <input type="text" placeholder="Search me" />
  <img src="../img/搜索.png" class="icon">
</div>

</body>

</html>
